gxt4500: use display information in info not in var for panning

We must not use any information in the passed var besides xoffset,
yoffset and vmode as otherwise applications might abuse it.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/video/gxt4500.c b/drivers/video/gxt4500.c
index 896e53dea906..0fad23f810a3 100644
--- a/drivers/video/gxt4500.c
+++ b/drivers/video/gxt4500.c
@@ -543,8 +543,8 @@ static int gxt4500_pan_display(struct fb_var_screeninfo *var,
 
         if (var->xoffset & 7)
                 return -EINVAL;
-        if (var->xoffset + var->xres > var->xres_virtual ||
-            var->yoffset + var->yres > var->yres_virtual)
+        if (var->xoffset + info->var.xres > info->var.xres_virtual ||
+            var->yoffset + info->var.yres > info->var.yres_virtual)
                 return -EINVAL;
 
         writereg(par, REFRESH_START, (var->xoffset << 16) | var->yoffset);